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Old 20-Oct-2009, 06:25 PM
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Chiped D16A Question
I recently Bought 95 Civic Dx, with a chipped vtec engine, my main question is how does it sounds like a DOCH Vtec when its only SOCH usually theres only a single stage of vtec on SOCH, my last civic dint sound as aggressive as this one
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Old 20-Oct-2009, 08:41 PM
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it doesn't matter how it sounds it optimized for best exchange to the high cam. the lower its engaged the more pronounced it can be but doesn't mean that is what is best.
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Old 20-Oct-2009, 08:43 PM
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Originally Posted by ARLVtec
I recently Bought 95 Civic Dx, with a chipped vtec engine, my main question is how does it sounds like a DOCH Vtec when its only SOCH usually theres only a single stage of vtec on SOCH, my last civic dint sound as aggressive as this one
It should only sound "aggressive" when it's in the VTEC rpm range.

My D16y8 sounds more prominent and "aggressive" compared to my buddies old D16z6 ever did...but truth be told the 'sound' you hear when VTEC engages will sound different with a different Intake & Exhaust setup, just because of parts variation.
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Old 20-Oct-2009, 08:49 PM
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youtube them and listen to difference and its DOHC not doch and SOHC not soch
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Old 20-Oct-2009, 08:57 PM
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Originally Posted by 3rdgen3

My D16y8 sounds more prominent and "aggressive" compared to my buddies old D16z6 ever did.
Yeah when I had my Z6 is was nowhere near as loud as my buddies Y8.
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Old 20-Oct-2009, 09:06 PM
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most SOHC's have a quiet if not unnoticeable vtec crossover compared to the DOHC's. This is because on the DOHC's both the intake AND exhaust cams have the extra VTEC lobe so all 4 valves per cylinder are being affected by the vtec crossover. Whereas the SOHC only has the extra VTEC lobe on the intake side, so only 2 valves per cylinder are being affected.

Although, i have heard a couple of SOHC's that have a loud crossover similar to a dohc vtec engine.

On the stock d16z6 that was in my car I couldn't even really hear the vtec crossover and I had a SRI and exhaust at the time.
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Old 20-Oct-2009, 09:19 PM
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Originally Posted by zeeman
most SOHC's have a quiet if not unnoticeable vtec crossover compared to the DOHC's. This is because on the DOHC's both the intake AND exhaust cams have the extra VTEC lobe so all 4 valves per cylinder are being affected by the vtec crossover. Whereas the SOHC only has the extra VTEC lobe on the intake side, so only 2 valves per cylinder are being affected.

Although, i have heard a couple of SOHC's that have a loud crossover similar to a dohc vtec engine.

On the stock d16z6 that was in my car I couldn't even really hear the vtec crossover and I had a SRI and exhaust at the time.

Yea my soch sounds like a doch, thanks for the info buddy
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Old 21-Oct-2009, 01:56 AM
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^^ maybe there is a hidden cam?Lol srr. When I had my z6 the crossover was quite loud, not as loud as dohc though. OP have you been in a car with dohc vtec motor? Also what intake/exhaust are you running?
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Old 22-Oct-2009, 05:26 PM
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haha ill have to take a video and show you what i mean it has a dual crossover for a D16, im running stock exhaust so its all engine sound and the intake im sure is AEM, wide intake tho
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Old 22-Oct-2009, 08:39 PM
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I uploaded a vid, im running stock exhaust so its all engine sound and the intake im sure is AEM, wide intake tho

YouTube - Vtec Crossover
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Old 22-Oct-2009, 11:59 PM
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dunno sounds like my z6 used to... but i had a cheap ebay chip in mine so dunno [before bashing about the chip i got the car like that, i didnt install it]
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Old 23-Oct-2009, 02:37 AM
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Originally Posted by ARLVtec
I recently Bought 95 Civic Dx, with a chipped vtec engine, my main question is how does it sounds like a DOCH Vtec when its only SOCH usually theres only a single stage of vtec on SOCH, my last civic dint sound as aggressive as this one
Which D16 vtec engine is in there? D15b? D16z6? D16y8?

Thats exactly how the crossover sounds like on my 96 DX Coupe with a D16y8 from a 97 EL with the only mod i have is the custom intake i made...

Like i said...every Z6 ive heard when hitting vtec wasnt loud at all...
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Old 23-Oct-2009, 08:37 AM
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Originally Posted by 3rdgen3
Which D16 vtec engine is in there? D15b? D16z6? D16y8?

Thats exactly how the crossover sounds like on my 96 DX Coupe with a D16y8 from a 97 EL with the only mod i have is the custom intake i made...

Like i said...every Z6 ive heard when hitting vtec wasnt loud at all...
It says D16A on the Engine
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Old 23-Oct-2009, 10:23 AM
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Originally Posted by ARLVtec
It says D16A on the Engine
So it must be a 'mini-me' swap.

You're gonna have to check the head casting out than...
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Old 23-Oct-2009, 02:32 PM
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Originally Posted by 3rdgen3
So it must be a 'mini-me' swap.

You're gonna have to check the head casting out than...
Well buddy that had it before me got the engine for $500 with 50 000 on it so it could be a swap ill check it out when it stop raining
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Old 26-Oct-2009, 04:49 PM
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I had a D16A6/D16Z6 minime that was chipped and tuned by zeeman and it hit vtec hard like a dohc
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Old 26-Oct-2009, 06:42 PM
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Originally Posted by jamie1985
I had a D16A6/D16Z6 minime that was chipped and tuned by zeeman and it hit vtec hard like a dohc
hah yea its awesome, a lot of ppl thought i had DOCH
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Old 26-Oct-2009, 06:44 PM
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or did they think you are a DOCH bag?
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Old 26-Oct-2009, 06:45 PM
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Dohc*
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Old 04-Nov-2009, 04:25 PM
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Lol!
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